------------[ cut here ]------------
WARNING: CPU: 1 PID: 14881 at fs/inode.c:389 inc_nlink+0x121/0x130 fs/inode.c:389
Modules linked in:
CPU: 1 PID: 14881 Comm: syz.3.2430 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
RIP: 0010:inc_nlink+0x121/0x130 fs/inode.c:389
Code: 58 ea ff e9 3a ff ff ff 89 d9 80 e1 07 80 c1 03 38 c1 0f 8c 4c ff ff ff 48 89 df e8 f9 57 ea ff e9 3f ff ff ff e8 ef 0c 93 ff <0f> 0b eb 82 66 2e 0f 1f 84 00 00 00 00 00 90 f3 0f 1e fa 41 57 41
RSP: 0000:ffffc900112cfc28 EFLAGS: 00010287
RAX: ffffffff81f28ab1 RBX: ffff88805c580bf8 RCX: 0000000000080000
RDX: ffffc9000d7dd000 RSI: 0000000000013859 RDI: 000000000001385a
RBP: 0000000000000000 R08: ffff88805c58066b R09: 1ffff1100b8b00cd
R10: dffffc0000000000 R11: ffffed100b8b00ce R12: dffffc0000000000
R13: 1ffff1100b8b017f R14: ffff88805c580ba0 R15: 0000000000000000
FS:  00007faa79ff66c0(0000) GS:ffff8880b8f00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ff2436e0000 CR3: 000000002b865000 CR4: 00000000003506e0
Call Trace:
 <TASK>
 v9fs_vfs_mkdir_dotl+0x624/0x780 fs/9p/vfs_inode_dotl.c:431
 vfs_mkdir+0x296/0x440 fs/namei.c:4113
 do_mkdirat+0x1d4/0x440 fs/namei.c:4136
 __do_sys_mkdirat fs/namei.c:4151 [inline]
 __se_sys_mkdirat fs/namei.c:4149 [inline]
 __x64_sys_mkdirat+0x89/0xa0 fs/namei.c:4149
 do_syscall_x64 arch/x86/entry/common.c:51 [inline]
 do_syscall_64+0x55/0xb0 arch/x86/entry/common.c:81
 entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7faa7bd8d617
Code: 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 02 01 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007faa79ff5e68 EFLAGS: 00000246 ORIG_RAX: 0000000000000102
RAX: ffffffffffffffda RBX: 00007faa79ff5ef0 RCX: 00007faa7bd8d617
RDX: 00000000000001ff RSI: 00002000000002c0 RDI: 00000000ffffff9c
RBP: 00002000000001c0 R08: 0000000000000000 R09: 0000000000000000
R10: 00002000000001c0 R11: 0000000000000246 R12: 00002000000002c0
R13: 00007faa79ff5eb0 R14: 0000000000000000 R15: 0000000000000000
 </TASK>